3 weeks old - seems fussier/won't sleep in bassinet

Scarlet

My boy is 3 weeks today and has been a fairly good baby until the last couple days he's been fussy and won't sleep in his bassinet at night. I'm a first time mom so I'm not sure if this is normal? He cries during the day too unless he's laying on his belly on my chest. Just wondering if anyone knows what I can do for him at night since he can't be on his belly. I have tried gripe water too. 🤔